Portland State University's Nano-Crystallography Group: nanocrystallography.research.pdx.edu hosts small educational open access databases of common crystal structures (e.g. EDU-COD and CMD). The Wiki Crystallography Database, to which we invite you to contribute, offers over 8,000 entries on minerals.

Full Profile Search Match: A "Rietveld like" fitting procedure is utilized to quantify the crystal phase content as well as the average crystallite sizes and strains from a two column plain text input file that you need to create from the output of your powder X-ray diffractometer. The Crystallography Open Database (COD) provides the necessary crystal structure information. Since the basis of these quantifications is the automatic identification of the crystal phases in your crystal powder sample, it is all the more important that the scientific community makes the COD as complete as possible (by e.g. uploading their own CIFs or contributing to that project by other means). http://cod.iutcaen.unicaen.fr/

American Mineralogist Crystal Structure Database: Contains all crystal structure data published in the American Mineralogist, The Canadian Mineralogist, European Journal of Mineralogy, and Physics and Chemistry of Minerals, as well as selected datasets from other journals. Should the use of the database require a citation, then please use: Downs, R.T. and Hall-Wallace, M. (2003) The American Mineralogist Crystal Structure Database. American Mineralogist 88, 247-250. (to download *pdf); http://rruff.geo.arizona.edu/AMS/amcsd.php

Material Properties Open Database: An open access database focusing on crystallographic structures, material phases and their relation to macroscopic material properties. Should the use of this database require a citation, then please use: Giancarlo Pepponi, Saulius Gražulis, and Daniel Chateigner: MPOD: a Material Property Open Database linked to structural information. Nuclear Instruments and Methods in Physics Research B 284, 2012, 10-14. (to download *.pdf); http://www.materialproperties.org

The Inorganic Material Database: Aims to cover all basic crystal structure, x-ray diffraction, property and phase diagram data of inorganic and metallic materials. As of July 1, 2010, there were 82,000 crystal structure, 55,000 material property, and 15,000 phase diagram entries. Up to 30 crystallographic information files can be downloaded for free per day. Should the use of the database require a citation, then please use: Yibin Xu, Masayoshi Yamazaki, and Pierre Villars, (2011) Inorganic Materials Database for Exploring the Nature of Materials, Japanese Journal of Applied Physics 50, 11RH02. (to download *.pdf); http://crystdb.nims.go.jp/index_en.html

Cambridge Structural Database (CSD): Individual crystallographic information file data sets of small organic molecules are provided freely on the understanding that they are used for bona fide research purposes only. https://summary.ccdc.cam.ac.uk/structure-summary-form

Kenneth G. Libbrecht's Snow Crystal page: This site is all about snow crystals and snowflakes -- what they are, where they come from, and just how these remarkably complex and beautiful structures are created, quite literally, out of thin air. website

Celebrating 100 years of X-ray crystallography: A collection of articles contributed by speakers at the Bragg Centennial Symposium held in Adelaide on 6 December 2012. website. Selected papers: Introduction to these articles by S. W. Wilkins (*.pdf download). Background to the Nobel Prize to the Braggs (*.pdf download). The significance of Bragg's law in electron diffraction and microscopy, and Bragg's second law (*.pdf download).

Crystallography - Defining the Shape of Our Modern World: A Book Exhibit at the University of Illinois at Urbana-Champaign Commemorating the 100th anniversary of the discovery of X-ray diffraction, website.

UNESCO brochure - Crystallography matters!: This booklet outlines the scope of the International Year of Crystallography.The brochure can be downloaded in English, German, French and Arabic. The brochure, Crystallography matters! describes the role of crystallography in the modern world and the significance of the International Year of Crystallography. (*.pdf download) website.